JP3063611B2 - Electric rice cooker - Google Patents
Electric rice cookerInfo
- Publication number
- JP3063611B2 JP3063611B2 JP8058875A JP5887596A JP3063611B2 JP 3063611 B2 JP3063611 B2 JP 3063611B2 JP 8058875 A JP8058875 A JP 8058875A JP 5887596 A JP5887596 A JP 5887596A JP 3063611 B2 JP3063611 B2 JP 3063611B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- rice
- amount
- cooked
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、内鍋の底面側と
側面側の両方に加熱手段を備えた電気炊飯器に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker having heating means on both the bottom and side surfaces of an inner pot.
【０００２】[0002]
【従来の技術】最近の電気炊飯器では、電磁誘導加熱式
又はヒータ式の何れかに限らず、内鍋底面側の第１の加
熱手段による加熱に加えて、例えば加熱手段の一部を可
能な限り内鍋側方に寄せて設けることにより第２の加熱
手段を形成し、該第２の加熱手段によって内鍋側面側か
らの加熱をも行ない、可及的に内鍋全体を均一に加熱し
て炊きムラを少なくするような工夫がなされてきてい
る。2. Description of the Related Art A recent electric rice cooker is not limited to the electromagnetic induction heating type or the heater type, and for example, in addition to the heating by the first heating means on the bottom side of the inner pot, for example, a part of the heating means is possible. The second heating means is formed by being provided as close to the inner pan as possible, and the second heating means also heats the inner pan from the side, thereby heating the entire inner pan as uniformly as possible. Ingenuity has been devised to reduce uneven cooking.
【０００３】[0003]
【発明が解決しようとする課題】しかし、該構成の電気
炊飯器の場合、例えば図９の（Ａ）〜（Ｃ）に示すよう
に、炊飯量が大、中、少と少なくなるに従って第１の加
熱手段（第１のワークコイル）Ｃ1はともかく、第２の
加熱手段（第２のワークコイル）Ｃ2の飯米に対する位
置が上方側にズレてくる問題が生じる。しかも、上記第
１，第２の各加熱手段は同一の加熱制御回路で全体の加
熱量が制御されているにすぎない。However, in the case of the electric rice cooker having the above configuration, as shown in FIGS. 9A to 9C, the first rice cooker becomes smaller as the amount of cooked rice becomes smaller, larger, middle, or smaller. heating means (first work coil) C 1 aside, problems position relative to the second heating means (second work coil) Hanmai of C 2 comes shifted upward occurs. In addition, the first and second heating means only control the entire heating amount by the same heating control circuit.
【０００４】この結果、各加熱手段相互の加熱比率が固
定的にしか設定できないので、大・中・少の炊飯量をも
含めて炊飯量の変動による炊きムラを生じさせやすい傾
向もある。[0004] As a result, since the heating ratio of each heating means can be set only in a fixed manner, there is a tendency that unevenness in cooking due to fluctuations in the amount of cooked rice including large, medium and small amounts of cooked rice tends to occur.
【０００５】[0005]
【課題を解決するための手段】本願各発明は、上記のよ
うな課題を解決することを目的としてなされたものであ
って、該目的を達成するために、次のような課題解決手
段を備えて構成されている。SUMMARY OF THE INVENTION The inventions of the present application have been made for the purpose of solving the above-mentioned problems, and have the following means for solving the problems. It is configured.
【０００６】（１） 請求項１に係る発明 該発明の電気炊飯器は、内鍋と、該内鍋の底面側に設け
られた第１の加熱手段と、上記内鍋の側面側に設けられ
た第２の加熱手段と、炊飯量を判定する炊飯量判定手段
と、該炊飯量判定手段による炊飯量の判定が終了したの
ち、沸とう工程が完了するまでの炊飯工程において、上
記炊飯量判定手段により判定された炊飯量に応じて、上
記第１の加熱手段の加熱出力の比率を所定の加熱出力比
率に設定するとともに上記第１の加熱手段の加熱出力の
比率に対する上記第２の加熱手段の加熱出力の比率を所
定の比率関係で設定して上記内鍋を加熱制御する加熱制
御手段とを備えてなる電気炊飯器において、上記加熱制
御手段は、上記炊飯量の判定が終了したのち上記沸とう
工程が完了するまでの間は、その時の炊飯量に応じ、炊
飯量が大きい時は炊飯量が小さい時に比べて上記第２の
加熱手段の加熱出力の比率に対する第１の加熱手段の加
熱出力の比率を一旦上記炊飯量の判定を行う前の加熱出
力の比率よりも所定比率大きく設定する一方、上記沸と
う工程が完了すると、同第２の加熱手段の加熱出力の比
率に対する第１の加熱手段の加熱出力の比率を所定比率
小さく設定するように構成されている。(1) The invention according to claim 1 The electric rice cooker according to the invention is provided with an inner pot, first heating means provided on the bottom side of the inner pot, and a side face of the inner pot. The second heating means, the cooked rice amount determining means for determining the amount of cooked rice, and the determination of the amount of cooked rice in the rice cooking process after the determination of the cooked rice amount by the cooked rice amount determining means is completed and until the boiling step is completed. The ratio of the heating output of the first heating means is set to a predetermined heating output ratio in accordance with the amount of cooked rice determined by the means, and the second heating means with respect to the ratio of the heating output of the first heating means. And a heating control means for controlling the heating of the inner pan by setting the ratio of the heating output in a predetermined ratio relationship, wherein the heating control means, after the determination of the rice cooked amount is finished, Until the boiling process is completed, According to the amount of rice cooked at the time, the ratio of the heating output of the first heating unit to the ratio of the heating output of the second heating unit is larger when the amount of rice cooked is smaller than when the amount of rice cooked is smaller. On the other hand, when the heating step is completed, the ratio of the heating output of the first heating unit to the ratio of the heating output of the second heating unit is reduced by a predetermined ratio. It is configured to be set.
【０００７】したがって、該構成では例えば大炊飯量時
には小炊飯量時に比べて上記第１，第２の各加熱手段の
加熱出力の比率共に大きく、かつ特に内鍋底部側の第１
の加熱手段の加熱出力の比率が炊飯量の判定を行う前の
加熱出力の比率よりも大きい所定比率関係の十分な大加
熱量で内鍋底部から側部までを効率良く加熱することに
より確実に炊き上げ、また中炊飯量時には上記第１，第
２の各加熱手段の加熱出力の比率が共に上記大炊飯量時
よりも相対的に若干小さいが同様の関係の加熱量で内鍋
底部から側部を加熱して有効に炊き上げる。一方、小炊
飯量時には、それに比べて特に上記第２の加熱手段の加
熱出力の比率を小さくするようにし、内鍋側部の焦げ付
きを生じさせないようにして、それぞれその時の炊飯量
に応じて可及的に炊きムラを抑制するようにしているの
で、御飯を効率的な加熱量で、過加熱なく、美味しく炊
き上げることができる。Therefore, in this configuration, for example, the ratio of the heating output of each of the first and second heating means is larger when a large amount of rice is cooked than when a small amount of rice is cooked, and particularly, when the first rice is placed on the bottom side of the inner pot.
The ratio of the heating output of the heating means is higher than the ratio of the heating output before making the determination of the amount of cooked rice. When the rice is cooked and the amount of medium rice is cooked, the ratio of the heating output of each of the first and second heating means is relatively slightly smaller than that of the large amount of rice cooked. Heat the part and cook it effectively. On the other hand, when the amount of cooked rice is small, the ratio of the heating output of the second heating means is particularly reduced in comparison with the amount of cooked rice so as not to cause the inner pot side portion to be scorched. Since the unevenness of cooking is suppressed as much as possible, rice can be cooked deliciously with an efficient heating amount without overheating.
【０００８】（２） 請求項２に係る発明 該発明の電気炊飯器は、内鍋と、該内鍋の底面側に設け
られた第１の加熱手段と、上記内鍋の側面側に設けられ
た第２の加熱手段と、炊飯量を判定する炊飯量判定手段
と、該炊飯量判定手段による炊飯量の判定が終了した
後、沸とう工程が完了するまでの炊飯工程において、上
記炊飯量判定手段により判定された炊飯量に応じて、上
記第１の加熱手段の加熱出力の比率を所定の加熱出力比
率に設定するとともに上記第１の加熱手段の加熱出力の
比率に対する上記第２の加熱手段の加熱出力の比率を所
定の比率関係で設定して上記内鍋を加熱制御する加熱制
御手段とを備え、上記第１，第２の加熱手段は、何れか
一方の加熱手段が作動している時には他方側の加熱手段
が作動しないように構成されている。(2) The invention according to claim 2 The electric rice cooker according to the present invention is provided with an inner pot, first heating means provided on the bottom side of the inner pot, and side faces of the inner pot. The second heating means, the cooked rice amount determining means for determining the amount of cooked rice, and the determination of the amount of cooked rice in the cooked rice process until the boiling step is completed after the determination of the cooked rice amount by the cooked rice amount determination means is completed. The ratio of the heating output of the first heating means is set to a predetermined heating output ratio in accordance with the amount of cooked rice determined by the means, and the second heating means with respect to the ratio of the heating output of the first heating means. And a heating control means for controlling the heating of the inner pan by setting the ratio of the heating output in a predetermined ratio relationship, and one of the first and second heating means is operated. Sometimes it is configured so that the heating means on the other side does not work .
【０００９】したがって、該構成では、例えば一方の底
面側第１の加熱手段を所定の加熱出力比率で作動させた
時には、他方の側面側第２の加熱手段が作動しなくなっ
て内鍋の底部中央部分の温度が側部よりも高くなるた
め、内鍋の底部中央から上方に昇って半径方向外周囲に
降りる内対流が効果的に形成される一方、他方の側面側
第２の加熱手段を所定の加熱出力比率で作動させると、
今度は逆に一方の底面側第１の加熱手段が作動しなくな
って内鍋側部側の温度の方が高くなって、それまでとは
逆の半径方向外周囲から昇って中央部で下降する外対流
が効果的に形成される。そして、それらの動作を繰り返
すと、該２種の対流が交互に形成される結果、内鍋内の
全体を熱が均等に移動するようになって、その時の炊飯
量に応じて、より有効に炊きムラを抑制して御飯を効率
的な加熱量で美味しく炊き上げることができる。Therefore, in this configuration, for example, when one of the first heating means on the bottom side is operated at a predetermined heating output ratio, the second heating means on the other side is not operated and the bottom center of the inner pot is not operated. Since the temperature of the portion is higher than that of the side portion, an inner convection that rises upward from the center of the bottom of the inner pot and descends to the outer periphery in the radial direction is effectively formed, while the other side-side second heating means is provided in a predetermined manner. When operated at the heating output ratio of
This time, on the contrary, the first heating means on one bottom side does not operate, the temperature on the inner pot side becomes higher, and the temperature rises from the outer periphery in the opposite radial direction and falls at the center. Outer convection is effectively formed. And when these operations are repeated, as a result of the two types of convection being formed alternately, the heat moves evenly throughout the inner pot, and according to the amount of rice cooked at that time, more effectively. The rice can be cooked deliciously with an efficient heating amount by suppressing uneven cooking.
【００１０】（３） 請求項３に係る発明 該発明の電気炊飯器は、上記請求項１又は２記載の発明
の構成において、上記第２の加熱手段が、内鍋の満量炊
飯時の水位よりも下方に位置して設けられている。(3) The invention according to claim 3 In the electric rice cooker according to the invention, in the configuration according to the invention described in claim 1 or 2, the second heating means is configured such that the water level at the time of full cooking of the inner pan is cooked. It is provided below.
【００１１】このように、以上の請求項１又は２の発明
の各場合において、上記第２の加熱手段を、内鍋の満量
炊飯時の水位よりも下方に位置して設けると、それによ
り満量炊飯時にも上述の請求項１又は２各発明の作用を
有効に発揮させることができる。As described above, in each case of the first and second aspects of the present invention, when the second heating means is provided below the water level at the time of full cooking of the inner pan, The effects of the first and second aspects of the present invention can be effectively exerted even during full rice cooking.
【００１２】（４） 請求項４に係る発明 該発明の電気炊飯器は、上記請求項１又は２記載の発明
の構成において、上記第２の加熱手段が、内鍋の底面と
側面間のコーナ部に位置して設けられている。(4) The invention according to claim 4 In the electric rice cooker according to the invention, in the configuration according to the invention described in claim 1 or 2, the second heating means includes a corner between a bottom surface and a side surface of the inner pot. Part.
【００１３】このように、以上の請求項１又は２の発明
の各場合において、上記第２の加熱手段を、上記内鍋の
底面と側面間のコーナ部に位置して設けると、上述の請
求項１又は２各発明の作用が有効に発揮させることがで
きる。As described above, in each case of the first or second aspect of the present invention, when the second heating means is provided at a corner between the bottom surface and the side surface of the inner pot, the second heating means is provided. Item 1 or 2 The effect of each invention can be effectively exerted.
【００１４】（５） 請求項５に係る発明 該発明の電気炊飯器は、上記請求項１，２，３又は４記
載の発明の構成において、上記第１，第２の加熱手段
が、それぞれワークコイルよりなっいてる。(5) The invention according to claim 5 In the electric rice cooker according to the invention, in the configuration of the invention described in claim 1, 2, 3, or 4, the first and second heating means are each provided with a work. It consists of coils.
【００１５】該構成によると、ワークコイルよりなる第
１，第２の加熱手段によって上述の請求項１，２，３又
は４の各発明の作用が有効に実現される。According to this configuration, the operation of each of the first, second, third, and fourth aspects of the invention is effectively realized by the first and second heating means including the work coils.
【００１６】[0016]
【発明の効果】以上の結果、本願各発明の電気炊飯器に
よると、第１，第２の２組の加熱手段を適切に利用し、
炊飯量に応じて炊きムラを抑制して御飯を効率的な加熱
量で美味しく炊き上げることができる。As a result, according to the electric rice cooker of each invention of the present application, the first and second two sets of heating means are appropriately used,
In accordance with the amount of rice cooked, uneven cooking can be suppressed, and the rice can be cooked deliciously with an efficient heating amount.
【００１７】[0017]
【発明の実施の形態】(電気炊飯器本体および制御回路
部の基本構成) 図１〜図４は、後述する本願発明の実施の形態１および
２に共通する電気炊飯器本体とその制御回路部の構成と
を示している。DESCRIPTION OF THE PREFERRED EMBODIMENTS (Basic Configuration of Electric Rice Cooker Body and Control Circuit Unit) FIGS. 1 to 4 show an electric rice cooker body and a control circuit unit common to the first and second embodiments of the present invention described later. Is shown.
【００１８】先ず上記電気炊飯器は、例えばワークコイ
ルを備えた電磁誘導加熱式のものにより構成されてい
る。そして、炊飯と保温とを兼用するようになってい
る。First, the electric rice cooker is constituted by, for example, an electromagnetic induction heating type provided with a work coil. In addition, cooking rice and heat retention are also used.
【００１９】すなわち、該電気炊飯器本体１は、、例え
ば図１および図２に示すように、内部に誘起されるうず
電流によって自己発熱が可能なステンレス鋼等の鉄系金
属よりなる内鍋(飯器)２と、該内鍋２を任意にセットし
得るように形成された合成樹脂製の有底筒状の内ケース
（保護枠）３と、該内ケース３を保持する外部筺体であ
る筒状の外ケース４と、該外ケース４と上記内ケース３
とを一体化して形成された容器本体の上部に開閉可能に
設けられた蓋ユニット５とから構成されている。That is, as shown in FIGS. 1 and 2, for example, the electric rice cooker main body 1 has an inner pot made of an iron-based metal such as stainless steel capable of self-heating by an eddy current induced therein. A rice cooker) 2, an inner case (protective frame) 3 made of a synthetic resin and having a bottom and formed so that the inner pot 2 can be set arbitrarily, and an outer housing for holding the inner case 3. A cylindrical outer case 4, the outer case 4, and the inner case 3;
And a lid unit 5 provided on the upper part of the container body integrally formed with the lid unit 5 so as to be openable and closable.
【００２０】上記内ケース３の底部３aの下面と側部３
ｂの外面、さらに詳細に言うと底部３ａの下面と、底部
３ａと側部３ｂとの間のコーナ部の外面の各面は、図１
〜図３に示すように半径方向の位置を異にする同心状の
第１，第２のリブ９１,９２によって内外２組の第１，
第２のワークコイルＣ1，Ｃ2を所定の間隔を保って嵌装
し得るように構成されており、該第１，第２のワークコ
イルＣ1，Ｃ2は、上記第１，第２のリブ９１,９２を介
した半径方向内側の底部３ａ下面と、その外側の底部３
ａと側部３ｂとの間のコーナ部の外面の各嵌装面にそれ
ぞれ接着剤を介して接合固定されている。The lower surface of the bottom 3a of the inner case 3 and the side 3
b, more specifically, the lower surface of the bottom 3a and the outer surfaces of the corners between the bottom 3a and the side 3b are shown in FIG.
As shown in FIG. 3, two sets of inner and outer first and second sets of first and second ribs 91 and 92 having different radial positions are provided.
The first work coil C 1 and the second work coil C 2 are configured so as to be fitted at predetermined intervals, and the first and second work coils C 1 and C 2 are attached to the first and second work coils C 1 and C 2 . The lower surface of the radially inner bottom 3a via the ribs 91, 92 of the
Each of the fitting surfaces on the outer surface of the corner portion between a and the side portion 3b is joined and fixed via an adhesive.
【００２１】したがって、該構成では、上記内鍋２はそ
の底部２ａと側部２ｃ、さらに詳細に言うと底部２ａ
と、底部２ａと側部２ｃとの間のコーナ部の両位置で各
々ワークコイルと対応して均一に発熱し、また内部に後
述するような内対流、外対流を形成して、飯米を加熱ム
ラなく効率良く炊き上げる。Therefore, in this configuration, the inner pot 2 has a bottom portion 2a and a side portion 2c, more specifically, a bottom portion 2a.
Heat is generated uniformly at both positions of the corner portion between the bottom 2a and the side portion 2c, corresponding to the work coil, and an inner convection and an outer convection as described later are formed therein to heat the cooked rice. Cook efficiently without unevenness.
【００２２】なお、上記のように、上記第２のワークコ
イルＣ2は、上記内鍋２の満量炊飯時の水位よりも下方
に位置して設けられていることが好ましく、それにより
満量炊飯時にも、上記の各作用を有効に発揮させること
ができる。As described above, the second work coil C 2 is preferably provided below the water level of the inner pot 2 at the time of full rice cooking, whereby the full work coil C 2 is provided. Each of the above-mentioned effects can be effectively exhibited even during rice cooking.
【００２３】また、その場合において、特に上記第２の
ワークコイルＣ2を、上述のように内鍋２の底面２ａと
側部２ｃ面間のコーナ部に位置して設けると、上述の各
作用がより有効に発揮されるようになる。In this case, when the second work coil C 2 is provided at the corner between the bottom surface 2 a and the side portion 2 c of the inner pot 2 as described above, the above-mentioned respective functions are obtained. Will be exhibited more effectively.
【００２４】また上記外ケース４は、例えば合成樹脂板
で形成された上下方向に筒状のカバー部４aと、該カバ
ー部４aの上端部に結合された合成樹脂製の肩部４bと、
上記カバー部４aの下端部に結合された合成樹脂製の底
部４cとによって上記内ケース３の底部３aとの間に所定
広さの空間部６を形成する状態で全体として有底の筒状
体に構成されている。そして、その内側上部に上記のよ
うに内鍋２を取り出し可能に任意にセットするための同
じく有底筒状構造に形成した上記合成樹脂製の内ケース
３を支持している。The outer case 4 includes a vertically-covered cylindrical cover portion 4a formed of, for example, a synthetic resin plate, and a synthetic resin shoulder portion 4b coupled to an upper end of the cover portion 4a.
A cylindrical body having a bottom as a whole in a state in which a space portion 6 having a predetermined width is formed between the bottom portion 3a of the inner case 3 and a bottom portion 4c made of a synthetic resin coupled to a lower end portion of the cover portion 4a. Is configured. An inner case 3 made of the above-described synthetic resin and having the same bottomed tubular structure for arbitrarily setting the inner pot 2 so as to be able to be taken out as described above is supported on the inner upper portion thereof.
【００２５】該内ケース３の底部３a外周部の上記第
１，第２のワークコイルＣ1，Ｃ2間を仕切る上記第１，
第２のリブ９１,９２の間の一部には下面側で凹状部と
した薄肉部３０が形成されており、該薄肉部３０の下面
側には後述するようにして異常加熱時に上記第１，第２
のワークコイルＣ1，Ｃ2およびマイクロコンピュータよ
りなる炊飯用のマイコン制御ユニット（図４の符号６１
参照：後述)への電源を遮断する温度ヒューズ１５が設
けられている。そして、該内ケース３の底部３a下面お
よび側部３ｂ外面に上述のように第１，第２のワークコ
イルＣ1，Ｃ2が設けられ、さらにそれらの下部にコイル
台８が設けられている。The first and second work coils C 1 and C 2 on the outer periphery of the bottom 3 a of the inner case 3 are partitioned between the first and second work coils C 1 and C 2 .
A thin portion 30 having a concave portion on the lower surface side is formed in a portion between the second ribs 91 and 92, and the first thin portion 30 is formed on the lower surface side of the thin portion 30 during abnormal heating as described later. , Second
Microcomputer control unit (reference numeral 61 in FIG. 4) for cooking rice, comprising the work coils C 1 and C 2 of FIG.
A thermal fuse 15 for shutting off the power supply to the power supply (see: described later) is provided. As described above, the first and second work coils C 1 and C 2 are provided on the lower surface of the bottom portion 3 a and the outer surface of the side portion 3 b of the inner case 3, and the coil stand 8 is provided below them. .
【００２６】また、上記外ケース４のカバー部４a前面
側には操作パネル部１２０が設けられ、その裏側には上
記マイコン制御ユニット（図４の符号６１参照）等を設
けた操作基板１００が設けられている。An operation panel section 120 is provided on the front side of the cover 4a of the outer case 4, and an operation board 100 provided with the microcomputer control unit (reference numeral 61 in FIG. 4) is provided on the back side thereof. Have been.
【００２７】また、上記コイル台８の下方部には、上記
操作基板１００側の上記マイクロコンピュータよりなる
マイコン制御ユニット(図４の符号６１参照)によって上
記第１，第２のワークコイルＣ1，Ｃ2各々のＯＮ，ＯＦ
ＦおよびＯＮ時の通電量制御（出力制御）を相互に独立
して行う２組のワークコイル駆動回路を備えた炊飯器制
御回路を有する制御基板３６が設けられている。The first and second work coils C 1 , C 2, C 1 , C 2, C 3 , C 4 , C 5 , B 5 are provided below the coil base 8 by a microcomputer control unit (see reference numeral 61 in FIG. 4) comprising the microcomputer on the operation board 100 side. C 2 each ON, oF
A control board 36 having a rice cooker control circuit including two sets of work coil drive circuits for independently controlling the amount of electricity (output control) when F and ON is provided.
【００２８】ところで、上記コイル台８は、例えば半径
方向に放射状に延び全体として受皿形状の内ケース支持
面を有して上記第１，第２のワークコイルＣ1，Ｃ2を支
持するリブ構造のワークコイル支持部８ａ，８ａ・・
と、該ワークコイル支持部８a，８ａ・・・間に形成さ
れたフェライトコア嵌挿溝９,９と、上記ワークコイル
支持部８ａ，８ａ・・・の下部側に設けられた脚部１
０,１０・・とから構成されており、上記脚部１０,１０
・・によって上記外ケース４の底部４c上に支持されて
いる。該コイル台８の上記ワークコイル支持部８a，８
ａ・・・の側部外周面には、上記フェライトコア嵌挿溝
９,９・・・の一端部(半径方向外端部)両側に位置して
縦壁構造の一対のスペーサ１１,１１・・が設けられて
おり、該スペーサ１１,１１・・を介して所定の間隔を
保った状態で、その外周囲に第２のワークコイルＣ2か
らの磁気を遮蔽するリング状の磁気遮蔽板１２が下方側
から嵌合されて固定されている。The coil base 8 extends radially in the radial direction, for example, and has a generally pan-shaped inner case supporting surface to support the first and second work coils C 1 and C 2. Work coil supporting parts 8a, 8a
, Ferrite core insertion grooves 9, 9 formed between the work coil support portions 8a, 8a..., And leg portions 1 provided on the lower side of the work coil support portions 8a, 8a.
., And the leg portions 10, 10
. Is supported on the bottom 4c of the outer case 4. The work coil supporting portions 8a, 8
A pair of spacers 11, 11... of a vertical wall structure are located on both sides of one end (radial outer end) of the ferrite core fitting grooves 9, 9. Are provided, and a ring-shaped magnetic shielding plate 12 for shielding the magnetism from the second work coil C2 is provided around the outer periphery of the ring-shaped magnetic shielding plate 12 at a predetermined interval via the spacers 11, 11,. Are fitted and fixed from below.
【００２９】また、上記フェライトコア嵌挿溝９,９・
・・は、例えば相互に円周方向に９０度の間隔を保って
半径方向に延び、しかも上下に貫通した状態で形成され
ており、半径方向に所定の間隔を置いてフェライトコア
１３,１３・・が嵌合されている。Further, the ferrite core insertion grooves 9, 9.
The ferrite cores 13 and 13 are formed, for example, so as to extend in the radial direction at intervals of 90 degrees in the circumferential direction, and penetrate vertically, and at predetermined intervals in the radial direction. Is fitted.
【００３０】さらに上記コイル台８の上述した内ケース
底部３ａの上記薄肉部３０に対応する部分には、例えば
図３に詳細に示すように、所定口径の開口部８０が形成
されており、該開口部８０を介して上記ワークコイル支
持部８ａ，８ａ・・・の上方に起立して断面Ｈ形をした
温度ヒューズホルダー１４が着脱可能に取付けられるよ
うになっており、該温度ヒューズホルダー１４によって
例えば絶縁チューブに入った円筒形の温度ヒューズ１５
が当該内ケース３の底部３aの薄肉部３０下面３０aに接
触する状態で支持されている。Further, an opening 80 having a predetermined diameter is formed in a portion of the inner case bottom 3a of the coil base 8 corresponding to the thin portion 30, for example, as shown in detail in FIG. The temperature fuse holder 14 having an H-shaped cross section which rises above the work coil supporting portions 8a, 8a... Through the opening 80 is detachably attached. For example, a cylindrical thermal fuse 15 in an insulating tube
Are supported in contact with the lower surface 30a of the thin portion 30 of the bottom 3a of the inner case 3.
【００３１】すなわち、温度ヒューズホルダー１４は断
面Ｈ形のホルダー部上端側凹部１４aに温度ヒューズ１
５を保持しているとともに下部側の側壁部の一部を外側
に水平方向に折り曲げてコイル台８下面への取付部１４
bを形成しており、該取付部１４bをコイル台８の下面に
ビス８１で締結することにより、着脱可能な状態で下方
側から固定されている。That is, the thermal fuse holder 14 is provided with the thermal fuse 1 in the concave portion 14a on the upper end side of the holder portion having the H-shaped cross section.
5 and a part of the lower side wall is bent outward in the horizontal direction so as to be attached to the lower surface of the coil base 8.
The mounting portion 14b is fixed to the lower surface of the coil base 8 from below by detaching it by fastening the mounting portion 14b with a screw 81.
【００３２】一方、上記内ケース３は底部３aおよび側
壁部３bが一体成型されており、その底部３a中央部およ
びコイル台８のワークコイル支持部８a，８ａ・・・の
基板中央部には、上下方向に同心状に貫通したセンタセ
ンサ１６の収納空間部(嵌装穴)１７が形成されており、
該センタセンサ収納空間部１７中に上下方向に昇降自在
な状態で、かつ常時コイルスプリング１８により上方に
上昇付勢された状態で内鍋のセット状態検知用のセンタ
センサ２２が設けられている。On the other hand, the bottom part 3a and the side wall part 3b of the inner case 3 are integrally formed, and the center part of the bottom part 3a and the center part of the work coil support parts 8a, 8a. A storage space (fitting hole) 17 for the center sensor 16 penetrating concentrically in the vertical direction is formed,
A center sensor 22 for detecting the set state of the inner pot is provided in the center sensor storage space 17 in a vertically movable state and constantly upwardly biased by a coil spring 18.
【００３３】上記センタセンサ収納空間部１７は、上記
コイル台８中央部で上下両方向に延びるリブによって形
成された筒体１９内に形成され、その下部側開口部には
センサカバー２０が嵌合され、ビス２１で上記コイル台
８側筒体１９一側の圧肉壁部に固定されている。The center sensor storage space 17 is formed in a cylindrical body 19 formed by a rib extending in both the upper and lower directions at the center of the coil stand 8, and a sensor cover 20 is fitted into a lower opening thereof. , Screws 21 are fixed to the pressure wall portion on one side of the cylinder body 19 on the coil stand 8 side.
【００３４】センタセンサ２２は、本実施の形態の場
合、例えば、その筒状のセンサホルダー内上端部のセン
サ保持部９４に異常温度検出のための大径の温度ヒュー
ズは設けられておらず、温度ヒューズに比べて相当に小
さな上記内鍋２の温度を検出するサーミスタ(温度セン
サ)２３ａのみが中央部に位置して設けられているとと
もに当該センサホルダーの上端部のセンサ保持部９４上
面には当該サーミスタ２３ａのみを設けた小径のセンサ
保持部９４をカバーするのに十分な、小径で熱伝導性の
良好な金属材料よりなるセンサキャップ２５が一体に嵌
合固定されている。そして、上記筒状のセンサホルダー
の上方側縁部２６下部には周方向にシールド用のリップ
部９３aを設けたリング状のシールド部材９３が嵌合さ
れ、該シールド部材９３と下方側センサカバー２０の蓋
面２７との間に介装されたコイルスプリング１８によっ
てセンサホルダー全体が昇降可能かつ常時上方に付勢さ
れた状態で支持されている。In the case of the present embodiment, for example, the center sensor 22 does not have a large-diameter thermal fuse for detecting an abnormal temperature in the sensor holding portion 94 at the upper end inside the cylindrical sensor holder. Only the thermistor (temperature sensor) 23a for detecting the temperature of the inner pot 2 which is considerably smaller than the temperature fuse is provided at the center portion and the upper surface of the sensor holder has a sensor holding portion 94 on the upper surface thereof. A sensor cap 25 made of a metal material having a small diameter and good thermal conductivity, which is sufficient to cover the small-diameter sensor holding portion 94 provided with only the thermistor 23a, is integrally fitted and fixed. A ring-shaped shield member 93 provided with a lip portion 93a for shielding in the circumferential direction is fitted to a lower portion of the upper edge portion 26 of the cylindrical sensor holder, and the shield member 93 and the lower sensor cover 20 are fitted. The entire sensor holder is supported by a coil spring 18 interposed between the sensor holder and the cover surface 27 so as to be vertically movable and constantly urged upward.
【００３５】センサホルダー内のセンサ保持部９４の下
部は角筒状に所定長さ下方に延びて下端にリードスイッ
チ取付部を形成している一方、上記下方側センサカバー
２０には筒状のマグネット取付部９５が形成されてい
る。そして、同マグネツト取付部９５の上端に取付けら
れたマグネツト２８と上記リードスイッチ取付部９６に
取付けられたリードスイッチ２９とが、上記センサホル
ダーの昇降動作に応じて接離することによって上記リー
ドスイッチ２９をＯＮ,ＯＦＦさせ、そのＯＮ,ＯＦＦ信
号によって内鍋２の非セット、セット状態を検出するよ
うになっている。A lower portion of the sensor holding portion 94 in the sensor holder extends downward by a predetermined length in the shape of a square tube to form a reed switch mounting portion at the lower end, while the lower sensor cover 20 has a cylindrical magnet. An attachment portion 95 is formed. Then, the magnet 28 attached to the upper end of the magnet attachment portion 95 and the reed switch 29 attached to the reed switch attachment portion 96 come into contact with and separate from each other in accordance with the elevating operation of the sensor holder. Are turned ON and OFF, and the non-set and set states of the inner pot 2 are detected by the ON and OFF signals.
【００３６】なお、符号３４は上記内ケース底部３aの
上記センサホルダーの上昇位置規制縁部であり、該縁部
３４は内ケース底部３aの上面よりも所定高さ上方に起
立され、上記センサ収納空間部１７内への水等の侵入が
生じにくいようにしている。Reference numeral 34 denotes an edge of the inner case bottom 3a for regulating the rising position of the sensor holder. The edge 34 stands up a predetermined height above the upper surface of the inner case bottom 3a, and the sensor housing Water and the like do not easily enter the space 17.
【００３７】また、本実施の形態の場合、上記内鍋２
は、その上縁部２bを上記外ケース４の肩部４b内側の内
鍋支持縁部８３に、耐熱性があり、かつ摩擦係数の高い
支持部材８４を介して係止することにより支持されてい
る。In the case of the present embodiment, the inner pan 2
Is supported on the inner pot supporting edge 83 inside the shoulder 4b of the outer case 4 by locking the upper edge 2b via a supporting member 84 having heat resistance and a high coefficient of friction. I have.
【００３８】一方、上記蓋ユニット５は、その外周面を
構成する合成樹脂製の外カバー３７と、該外カバー３７
の外周縁部内側に嵌合され、当該蓋ユニット５の内鍋２
への係合部を構成する合成樹脂製の内枠部３８と、該内
枠部３８内に嵌合される蓋ヒータ７２を備えた放熱板５
７とによって中空構造に形成されており、上記外カバー
３７と放熱板５７とは、内枠部３８を介して外周縁部同
士が相互に結合されている。この蓋ユニット５は、上記
外ケース４の肩部４bに対してヒンジ機構４０を介して
回動自在に取付けられており、その開放端側には、該蓋
ユニット５の所定位置に係合して蓋ユニット５の開閉を
行うロックレバー３９が設けられている。On the other hand, the lid unit 5 has an outer cover 37 made of a synthetic resin,
Of the inner pot 2 of the lid unit 5
Heat sink 5 having a synthetic resin inner frame portion 38 forming an engagement portion with a cover heater 72 fitted into the inner frame portion 38.
The outer cover 37 and the heat radiating plate 57 are connected to each other at their outer peripheral edges via an inner frame 38. The lid unit 5 is rotatably attached to a shoulder 4b of the outer case 4 via a hinge mechanism 40, and has an open end engaged with a predetermined position of the lid unit 5. A lock lever 39 for opening and closing the lid unit 5 is provided.
【００３９】また、上記蓋ユニット５の略中央部には、
蒸気放出口４３が上下方向に貫通して形成されている。
そして、該蒸気放出口４３にはラバー製のパッキン４５
が嵌合され、同パッキン４５を介して蒸気放出筒４４が
取付けられている。At a substantially central portion of the lid unit 5,
The vapor discharge port 43 is formed so as to penetrate vertically.
A rubber packing 45 is provided in the steam discharge port 43.
Are fitted, and the vapor discharge cylinder 44 is attached via the packing 45.
【００４０】次に、図４は上記のように構成された電気
炊飯器の炊飯用マイコン制御ユニット６１を中心とする
制御回路部の構成を示す。Next, FIG. 4 shows a configuration of a control circuit section centering on the rice cook microcomputer control unit 61 of the electric rice cooker configured as described above.
【００４１】図中、符号６１が上記外ケース４の前面側
操作パネル部１２０裏側の操作基板１００上に設けられ
た炊飯制御用のマイコン制御ユニット（ＣＰＵ）であ
り、該マイコン制御ユニット６１はマイクロコンピュー
タを中心とし、温度検出回路部、第１，第２の２組のワ
ークコイル駆動回路部、発振回路部、リセット回路部、
電源回路部、液晶表示部、ＬＥＤランプ表示部、操作ス
イッチ部等を備えて構成されている。In the figure, reference numeral 61 denotes a microcomputer control unit (CPU) for rice cooking control provided on the operation board 100 on the back side of the operation panel unit 120 on the front side of the outer case 4. Centering on a computer, a temperature detection circuit section, first and second two sets of work coil drive circuit sections, an oscillation circuit section, a reset circuit section,
It is provided with a power supply circuit section, a liquid crystal display section, an LED lamp display section, an operation switch section, and the like.
【００４２】そして、先ず温度検出回路２３部には、例
えば上記サーミスタ２３ａによる内鍋２の温度（御飯温
度）の検出値が入力されるようになっている。First, a temperature detection value of the temperature of the inner pot 2 (rice temperature) by the thermistor 23a is input to the temperature detection circuit 23.
【００４３】また、上記第１，第２の各ワークコイル駆
動回路部は、それぞれ独立して形成されており、先ず第
１のワークコイル駆動回路は、第１のパルス幅変調回路
５３、第１の同期トリガー回路５４、第１のＩＧＢＴ駆
動回路５２、第１のＩＧＢＴ５０、第１の共振コンデン
サ５１によって、また第２のワークコイル駆動回路は、
第２のパルス幅変調回路５８、第２の同期トリガー回路
５９、第２のＩＧＢＴ駆動回路５７、第２のＩＧＢＴ５
５、第２の共振コンデンサ５６によって各々形成されて
いる。そして、それぞれマイコン制御ユニット６１によ
り、上記第１のパルス幅変調回路５３、第２のパルス幅
変調回路５８をそれぞれ個々に独立して制御することに
より、例えば炊飯量（合数）に応じて上記第１，第２の
各ワークコイルＣ1，Ｃ2相互の出力比率（加熱比率）を
変えることによって炊飯少量時の第２のワークコイルＣ
2の電力消費の無駄を省き、また側面の焦げ付きをなく
したり、また同第１，第２の各ワークコイルＣ1，Ｃ2を
交互にＯＮ，ＯＦＦさせることにより、後述するように
炊飯量（合数）に応じて内鍋内に内対流と外対流を交互
に形成して炊きむらのない均一な加熱状態を実現するよ
うな特徴のある出力制御が行われる。The first and second work coil drive circuit sections are formed independently of each other. First, the first work coil drive circuit comprises a first pulse width modulation circuit 53, a first work coil drive circuit, and a second work coil drive circuit. The synchronous trigger circuit 54, the first IGBT drive circuit 52, the first IGBT 50, the first resonance capacitor 51, and the second work coil drive circuit
Second pulse width modulation circuit 58, second synchronization trigger circuit 59, second IGBT drive circuit 57, second IGBT 5
5, each of which is formed by the second resonance capacitor 56. The microcomputer control unit 61 controls the first pulse width modulation circuit 53 and the second pulse width modulation circuit 58 independently of each other. By changing the output ratio (heating ratio) of the first and second work coils C 1 and C 2 to each other, the second work coil C when the amount of rice cooked is small.
2 by eliminating waste of power consumption, eliminating sticking on the side, and alternately turning on and off the first and second work coils C 1 and C 2 , as described later. (Integral number), an internal convection and an external convection are alternately formed in the inner pan to perform a characteristic output control that realizes a uniform heating state without cooking unevenness.
【００４４】なお、図中の符号Ｄ1，Ｄ2は上記第１，第
２のＩＧＢＴ５０，５５の保護ダイオードである。ま
た、符号７１は、家庭用ＡＣ電源７０との間に挿入され
た上記第１，第２のワークコイルＣ1，Ｃ2の電源側平滑
回路である。Reference numerals D 1 and D 2 in the figure are protection diodes of the first and second IGBTs 50 and 55. Reference numeral 71 denotes a power supply side smoothing circuit of the first and second work coils C 1 and C 2 inserted between the home AC power supply 70.
【００４５】一方、符号７２は上述の蓋ヒータ、７３は
外ケース内底部の冷却ファンであり、それぞれトライア
ック７４，７５を介してトライアック駆動回路７６によ
ってＯＮ，ＯＦＦ駆動される。該蓋ヒータ７２、冷却フ
ァン７３の炊飯状態に対応したＯＮ，ＯＦＦ制御は、上
記マイコン制御ユニット６１により、上記トライアック
駆動回路７６を制御することによってなされる。On the other hand, reference numeral 72 denotes the above-described lid heater, and reference numeral 73 denotes a cooling fan on the inner bottom of the outer case, which is turned on and off by a triac drive circuit 76 via triacs 74 and 75, respectively. ON / OFF control corresponding to the rice cooking state of the lid heater 72 and the cooling fan 73 is performed by controlling the triac drive circuit 76 by the microcomputer control unit 61.
【００４６】また、符号７７は降圧トランス、７８は定
電圧電源回路であり、上記マイコン制御ユニット６１の
電源回路を形成している。Reference numeral 77 denotes a step-down transformer, and reference numeral 78 denotes a constant voltage power supply circuit, which forms a power supply circuit of the microcomputer control unit 61.
【００４７】さらに、符号６２は液晶表示部、６３は炊
飯表示、保温表示等の各種の表示を行うＬＥＤランプ
部、６４は炊飯スイッチ、保温スイッチ等の操作スイッ
チ部、６５は制御用の発振回路、７９はリセット回路で
ある。Further, reference numeral 62 denotes a liquid crystal display unit, 63 denotes an LED lamp unit for performing various displays such as rice cooking display and heat retention display, 64 denotes an operation switch unit such as a rice cooker switch and a heat insulation switch, and 65 denotes an oscillation circuit for control. , 79 are reset circuits.
【００４８】（実施の形態１） 次に、上記図１〜図３の構成の電気炊飯器において、上
述した図４の制御回路を使用して実施される本願発明の
実施の形態１に係る炊飯制御（吸水工程〜むらし工程ま
で）の内容について、図５のフローチャートを参照して
詳細に説明する。(Embodiment 1) Next, in the electric rice cooker having the configuration shown in FIGS. 1 to 3, the rice cooker according to Embodiment 1 of the present invention, which is implemented using the control circuit shown in FIG. The contents of the control (from the water absorption step to the spotting step) will be described in detail with reference to the flowchart of FIG.
【００４９】すなわち、先ず炊飯スイッチがＯＮ操作さ
れると、それに対応して吸水工程に入り（ステップ
Ｓ1）、底面側第１のワークコイルＣ1を出力５０％（加
熱出力の比率が全出力の５０％）でデューティー比１６
秒分の１６秒（以下、これを単に１６／１６（秒）のよ
うに省略して表現する）間、側面側第２のワークコイル
Ｃ2を出力５０％（加熱出力の比率が全出力の５０％）
で１６／１６（秒）間各々ＯＮにする（ステップＳ2，
Ｓ3）。That is, when the rice cooker switch is first turned on, a water absorption process is started correspondingly (step S 1 ), and the first work coil C 1 on the bottom side is output at 50% (the ratio of the heating output is the full output). 50%) and the duty ratio is 16
Seconds worth of 16 seconds (hereinafter, simply 16/16 (omitted to be expressed as seconds)) between the side surface side second work coil C 2 output 50% (the ratio of the heating output of the total output 50%)
To turn on for 16/16 (seconds) (steps S 2 ,
S 3).
【００５０】この結果、内鍋２内の水温が比較的緩やか
な上昇率で次第に上昇し、所定吸水温度で、所定時間内
の吸水工程を経た後、やがて合数判定を行うための基準
温度７０℃に近付く。As a result, the water temperature in the inner pot 2 gradually increases at a relatively gentle rate, and after a water absorption step within a predetermined time at a predetermined water absorption temperature, a reference temperature 70 for making a total number determination is eventually established. Approach ℃.
【００５１】そこで、次に上記サーミスタ２３ａを介し
て検出される上記温度検出回路２３の出力から、上記内
鍋２の温度が合数判定開始温度７０℃に達したか否かを
判定する（ステップＳ4）。Then, based on the output of the temperature detection circuit 23 detected via the thermistor 23a, it is determined whether or not the temperature of the inner pan 2 has reached the combined determination start temperature 70 ° C. (step). S 4).
【００５２】該判定の結果、ＹＥＳと判定されると、合
数判定に進む一方（ステップＳ5）、ＮＯの場合は上記
出力での加熱と上記７０℃の温度判定を繰り返す（ステ
ップＳ4，Ｓ2，Ｓ3，Ｓ4）。If the result of this determination is YES, the process proceeds to the sum determination (step S 5 ), while if NO, the heating at the output and the temperature determination at 70 ° C. are repeated (step S 4 , step S 4) . S 2, S 3, S 4 ).
【００５３】内鍋２の温度が７０℃に達して合数判定
（ステップＳ5）に進むと、上記合数判定開始温度７０
℃からの所定時間内の温度上昇率（又は上記７０℃から
所定温度までの上昇時間）に基き、現在炊飯中の飯米の
合数が、少量（図９Ｃ）か、中量（図９Ｂ）か、大量
（図９Ａ）かを順次判定する（ステップＳ6，Ｓ7）。When the temperature of the inner pan 2 reaches 70 ° C. and the procedure proceeds to the total number determination (step S 5 ), the above total number determination start temperature 70
Based on the temperature rise rate within a predetermined time from C (or the rise time from 70 C to a predetermined temperature), whether the total number of cooked rice is small (FIG. 9C) or medium (FIG. 9B) , A large amount (FIG. 9A) (steps S 6 and S 7 ).
【００５４】その結果、例えば図９の（Ａ）の場合のよ
うな大炊飯量時には、先ず上記底面側第１のワークコイ
ルＣ1の出力を７０％に設定して１６／１６（秒）、側
面側第２のワークコイルＣ2の出力を３０％に設定して
１６／１６（秒）間、それぞれＯＮにして、トータル１
００％の大出力（フルパワー）での炊き上げ加熱を実行
する（ステップＳ8，Ｓ9）。As a result, for example, at the time of large rice cooking as in the case of FIG. 9A, first, the output of the first work coil C1 on the bottom side is set to 70%, and 16/16 (seconds). during set the output of the side surface side second work coil C 2 30% 16/16 seconds each, to oN, total 1
Large output of 100% to perform a cook-up heating in (full power) (step S 8, S 9).
【００５５】そして、その後、上記内鍋２の温度が沸騰
温度１１０℃に達したか否かを判定し（ステップ
Ｓ10）、該判定結果がＹＥＳになると、上記底面側第１
のワークコイルＣ1の出力を５０％に、側面側第２のワ
ークコイルＣ2の出力を２０％に各々設定して、それぞ
れ１６／１６（秒）間ＯＮにし、該沸騰加熱状態を維持
する（ステップＳ11，Ｓ12）。Thereafter, it is determined whether or not the temperature of the inner pan 2 has reached the boiling temperature of 110 ° C. (step S 10 ), and if the determination result is YES, the first bottom side is determined.
The output of the work coil C 1 to 50%, by respectively setting the output side side second work coil C 2 to 20%, respectively to 16/16 (in seconds) during ON, the maintaining the boiling heated state (step S 11, S 12).
【００５６】そして、さらに上記内鍋２の温度が第１の
沸騰終了温度１３５℃に達したか否かを判定する（ステ
ップＳ13）。その結果、内鍋２の温度が１３５℃に達し
てＹＥＳと判定された時には沸騰工程完了と認めて、上
記底面側第１のワークコイルＣ1、側面側第２のワーク
コイルＣ2をＯＦＦにして「むらし工程」から「保温工
程」に移行する（ステップＳ26，Ｓ27）。Then, it is determined whether or not the temperature of the inner pot 2 has reached the first boiling end temperature of 135 ° C. (step S 13 ). As a result, when the temperature of the inner pot 2 reaches 135 ° C. and is determined to be YES, it is recognized that the boiling process is completed, and the bottom first work coil C 1 and the second side work coil C 2 are turned off. Te shifts to "incubating process" from the "steaming process" (step S 26, S 27).
【００５７】以上のように、例えば図９の（Ａ）のよう
に炊飯量が多く、上記底面側第１，側面側第２の各ワー
クコイルＣ1，Ｃ2による熱が共に内鍋２内の飯米に十分
に有効に作用し得る時は、先ず炊き上げ工程において、
それらを各々最大の出力比率（７０％：３０％）に設定
して大加熱量を内鍋全体に均一に作用させて確実に炊き
上げるとともに、続く沸騰工程では側面に焦げ目を作ら
ないように同出力を各々若干落した比率（５０％：２０
％）で、しっかりと炊飯する。As described above, for example, as shown in FIG. 9 (A), the amount of cooked rice is large, and the heat generated by the work coils C 1 , C 2 on the bottom side and the second side is both in the inner pot 2. First, in the cooking process, when it can work effectively on rice and rice
Each of them is set to the maximum output ratio (70%: 30%), and a large amount of heating is applied uniformly to the entire inner pot to ensure the cooking, and to prevent the subsequent boiling process from forming a brown spot on the side. Outputs slightly reduced (50%: 20
%) And cook rice firmly.
【００５８】その結果、御飯の全体に均等に十分な熱が
通り、しかも側面に焦げ目がない、ふっくらとした美味
しい御飯を大量に炊き上げることができる。As a result, it is possible to cook a large amount of plump and delicious rice, in which sufficient heat is evenly passed through the entire rice and the sides are not burnt.
【００５９】一方、上記と異なって例えば図９の（Ｂ）
の場合のような中炊飯量時には、先ず上記底面側第１の
ワークコイルＣ1の出力を上記大炊飯量時の場合よりも
１０％小さい６０％に設定し、かつ若干短かい１４／１
６（秒）間、また側面側第２のワークコイルＣ2の出力
を同じく１０％小さい２０％に設定して同じく１４／１
６（秒）間、それぞれＯＮにして、トータル８０％の出
力（ミドルパワー）での炊き上げ加熱を実行する（ステ
ップＳ14，Ｓ15）。On the other hand, unlike the above, for example, FIG.
In the case of the medium rice cooking amount as in the case of (1), first , the output of the first work coil C1 on the bottom side is set to 60%, which is 10% smaller than that in the case of the large rice cooking amount, and is slightly shorter than 14/1.
6 (seconds) between and also sets the output of the side surface side second work coil C 2 also 10% less 20% 14/1
6 (seconds) while, in the respective ON, the run the cook-up heating output of 80% total (middle power) (step S 14, S 15).
【００６０】そして、その後、上記内鍋２の温度が沸騰
温度１１０℃に達したか否かを判定し（ステップ
Ｓ16）、該判定結果がＹＥＳになると、上記底面側第１
のワークコイルＣ1の出力を上記大炊飯量時と同じ５０
％に、他方側面側第２のワークコイルＣ2の出力を上記
大炊飯量時よりも１０％小さい１０％に各々設定して、
それぞれ１４／１６（秒）間ＯＮにし、該沸騰加熱状態
を維持する（ステップＳ17，Ｓ18）。Thereafter, it is determined whether or not the temperature of the inner pot 2 has reached the boiling temperature of 110 ° C. (step S 16 ). If the determination result is YES, the first bottom side first is determined.
Work same 50 as when the large cooking amount the output of the coil C 1
Percent, and the output of the other side surface side second work coil C 2 respectively set to 10% less 10% than when the large cooking amount,
Each is turned on for 14/16 (seconds), and the boiling state is maintained (steps S 17 and S 18 ).
【００６１】そして、さらに上記内鍋２の温度が上記大
炊飯量時よりも５℃低い第２の沸騰終了温度１３０℃に
達したか否かを判定する（ステップＳ19）。その結果、
内鍋２の温度が１３０℃に達してＹＥＳと判定された）
時には沸騰工程完了と認めて、上記底面側第１のワーク
コイルＣ1、側面側第２のワークコイルＣ2を各々ＯＦＦ
にして「むらし工程」から「保温工程」に移行する（ス
テップＳ26，Ｓ27）。Then, it is further determined whether or not the temperature of the inner pot 2 has reached a second boiling end temperature of 130 ° C., which is 5 ° C. lower than the time of the large cooking amount (step S 19 ). as a result,
(The temperature of inner pot 2 reached 130 ° C. and was determined to be YES.)
Sometimes, it is recognized that the boiling process is completed, and the first work coil C 1 on the bottom surface and the second work coil C 2 on the side surface are turned off.
Shifts to "warmth step" to the "steaming process" (step S 26, S 27).
【００６２】以上のように、例えば図９の（Ｂ）のよう
に炊飯量が中程度に減少して、上記底面側第１，側面側
第２の各ワークコイルＣ1，Ｃ2による熱がそれぞれ内鍋
２内の飯米に十分に有効に作用し得るが、第２のワーク
コイルＣ2による加熱量が上記大炊飯量時ほどには大き
くなくても良いような時は、先ず炊き上げ工程では、そ
れらを大炊飯量時に比較して各々１０％程度小さい出力
に設定して確実に炊き上げる一方、沸騰工程では、大炊
飯量時ほどには大きな加熱量を必要としない第２のワー
クコイルＣ2の出力を若干余計に落した出力比率で、側
面に焦げ目を作らないようにして、しっかりと炊飯す
る。As described above, for example, as shown in FIG. 9B, the amount of cooked rice is reduced to a medium level, and the heat generated by the work coils C 1 and C 2 on the bottom side and the second side is reduced. Although it may act sufficiently efficiently into Hanmai in the pot 2, respectively, when the amount of heating by the second work coil C 2 is as may be large as much as when the large cooking amount is first cooked up process Then, they are set to an output which is about 10% smaller than that of the large rice cooker, respectively, and cook reliably, while the second work coil which does not require a large heating amount in the boiling process as in the large rice cooker. output ratios extra dropped slightly output of C 2, so as not to create browning on the sides, firmly rice.
【００６３】その結果、御飯の全体に均等に十分な熱が
通り、しかも側面に焦げ目がない、ふっくらとした美味
しい中量の御飯を効率良く炊き上げることができる。As a result, it is possible to efficiently cook a plump and delicious medium amount of rice that has sufficient heat evenly throughout the rice and has no burnt side surfaces.
【００６４】他方、例えば図９の（Ｃ）の場合のような
少炊飯量時には、先ず当該炊飯量に対応して上記底面側
第１のワークコイルＣ1の出力を上記中炊飯量時よりも
更に１０％小さい５０％に設定して時間も短かい１０／
１６（秒）間、また側面側第２のワークコイルＣ2の出
力を同じく中炊飯量時よりも１０％小さい１０％に設定
して同じく１０／１６（秒）間、それぞれＯＮにして、
トータル６０％の出力（スモールパワー）での炊き上げ
加熱を執行する（ステップＳ20，Ｓ21）。On the other hand, when the amount of cooked rice is small, for example, in the case of FIG. 9C, first, the output of the first work coil C1 on the bottom side is set to correspond to the amount of cooked rice as compared with the amount of cooked rice. Furthermore, it is set to 50%, which is 10% smaller, and the time is shorter.
16 (s) between, and also 10/16 (in seconds) during set to 10% less 10% than when similarly medium cooking amount output side side second work coil C 2, each to ON,
The output of the 60 percent total Enforce cook up heating in (small power) (step S 20, S 21).
【００６５】そして、その後、上記内鍋２の温度が沸騰
温度１１０℃に達したか否かを判定し（ステップ
Ｓ22）、該判定結果がＹＥＳになると、上記底面側第１
のワークコイルＣ1の出力をそのままの５０％に設定し
て１０／１６（秒）間、他方側面側第２のワークコイル
Ｃ2の方はＯＦＦ（出力を０％）にして、該沸騰加熱状
態を維持する（ステップＳ23，Ｓ24）。Thereafter, it is determined whether or not the temperature of the inner pan 2 has reached the boiling temperature of 110 ° C. (step S 22 ). If the determination result is YES, the first bottom side is determined.
During set the output of the work coil C 1 as it is 50% 10/16 (in seconds), the direction of the other side surface side second work coil C 2 in the OFF (0% output), the boiling heat maintaining the state (step S 23, S 24).
【００６６】そして、さらに上記内鍋２の温度が上記中
炊飯量時よりも５℃低い第３の沸騰終了温度１２５℃に
達したか否かを判定する（ステップＳ25）。その結果、
内鍋２の温度が同１２５℃に達してＹＥＳと判定された
時には沸騰工程完了と認めて、上記底面側第１のワーク
コイルＣ1、側面側第２のワークコイルＣ2をそれぞれＯ
ＦＦにして「むらし工程」から「保温工程」に移行する
（ステップＳ26，Ｓ27）。Then, it is further determined whether or not the temperature of the inner pot 2 has reached a third boiling end temperature of 125 ° C., which is 5 ° C. lower than the time of the medium rice cooking (step S 25 ). as a result,
When the temperature of the inner pot 2 reaches 125 ° C. and the determination is YES, it is recognized that the boiling process is completed, and the first work coil C 1 on the bottom surface and the second work coil C 2 on the side surface are respectively set to O.
In the FF shifts to "incubating process" from the "steaming process" (step S 26, S 27).
【００６７】以上のように、例えば図９の（Ｃ）のよう
に炊飯量が少なく、上記底面側第１のワークコイルＣ1
はともかく，側面側第２の各ワークコイルＣ2による熱
が内鍋２内の飯米に対して有効に作用せず、むしろ過加
熱となって御飯上部に焦げつきを生じさせやすい時は、
先ず炊き上げ工程では、第２のワークコイルＣ2の出力
を１０％程度の極めて小さい値に設定して主として底面
側第１のワークコイルＣ1（出力５０％）によって確実
に炊き上げ、電力消費の無駄を省く。また、沸騰工程で
は、特に側面に焦げ目を作らないように第２のワークコ
イルＣ2を完全にＯＦＦにして、第１のワークコイルＣ1
のみで炊飯する。As described above, for example, as shown in FIG. 9C, the amount of cooked rice is small, and the first work coil C 1 on the bottom side is used.
Anyway, when the heat generated by the second side work coil C 2 does not effectively act on the rice in the inner pot 2, but rather overheats and easily causes the upper portion of the rice to burn,
First, in the cooking process, the output of the second work coil C 2 is set to an extremely small value of about 10%, and the bottom work is reliably cooked mainly by the first work coil C 1 (output 50%), thereby reducing power consumption. Of waste. Further, in the boiling step, the second work coil C 2 is completely turned off so as not to form a burn on the side surface, and the first work coil C 1 is turned off.
Cook only with rice.
【００６８】以上の結果、本実施の形態の電気炊飯器に
よると、第１，第２の２組のワークコイル（加熱手段）
を適切に利用し、その時の炊飯量に応じて炊きムラを抑
制して御飯を効率的な加熱量で美味しく炊き上げること
ができるようになる。As a result, according to the electric rice cooker of the present embodiment, the first and second two sets of work coils (heating means)
, The rice can be cooked deliciously with an efficient amount of heating by suppressing uneven cooking in accordance with the amount of rice cooked at that time.
【００６９】また、電力の無駄がなくなり、過加熱も生
じにくいので、製品の信頼性が向上する。Further, power is not wasted and overheating is less likely to occur, so that the reliability of the product is improved.
【００７０】（実施の形態２） 次に、上記図１〜図３の構成の電気炊飯器において、上
述した図４の制御回路を使用して実施される本願発明の
実施の形態２に係る炊飯制御（吸水工程〜むらし工程ま
で）の内容について、図６のフローチャートを参照して
詳細に説明する。(Embodiment 2) Next, in the electric rice cooker having the configuration shown in FIGS. 1 to 3, the rice cooker according to Embodiment 2 of the present invention, which is implemented using the control circuit shown in FIG. The contents of the control (from the water absorption step to the spotting step) will be described in detail with reference to the flowchart of FIG.
【００７１】本実施の形態のものは、合数判定後の各ワ
ークコイルＣ1，Ｃ2の加熱出力の比率を炊飯量に応じて
適切に変化させると同時に、該比率で交互にＯＮ（作
動），ＯＦＦ（非作動）させることにより、図７の
（Ａ），（Ｂ）に示すように効果的に内対流と外対流を
形成するようにしたことを特徴としている。In this embodiment, the ratio of the heating output of each of the work coils C 1 and C 2 after judging the total number is appropriately changed according to the amount of cooked rice, and at the same time, the ratio is alternately turned on (operating). ) And OFF (non-operating), thereby effectively forming an internal convection and an external convection as shown in FIGS. 7A and 7B.
【００７２】すなわち、先ず炊飯スイッチがＯＮ操作さ
れると、それに対応して吸水工程に入り（ステップ
Ｓ1）、底面側第１のワークコイルＣ1を出力５０％（加
熱出力の比率が全出力の５０％）で、側面側第２のワー
クコイルＣ2を出力５０％（加熱出力の比率が全出力の
５０％）で各々ＯＮにする（ステップＳ2，Ｓ3）。That is, when the rice cooker switch is first turned on, the water absorption process is started correspondingly (step S 1 ), and the first work coil C 1 on the bottom side is output at 50% (the ratio of the heating output is the full output). at 50%), the side surface side second work coil C 2 output 50% (the ratio of the heating output to each oN 50%) of the total output (step S 2, S 3).
【００７３】この結果、内鍋２内の水温が比較的緩やか
な上昇率で次第に上昇し、所定温度、所定時間内の吸水
工程を経てやがて合数判定を行うための合数判定開始温
度７０℃に近付く。As a result, the water temperature in the inner pan 2 gradually rises at a relatively slow rate, and after a predetermined temperature and a water absorption step within a predetermined time, a total determination start temperature of 70 ° C. for performing the total determination. Approach.
【００７４】そこで、次に上記サーミスタ２３ａを介し
て検出される温度検出回路２３の出力から、上記内鍋２
の温度が実際に該合数判定開始温度７０℃に達したか否
かを判定する（ステップＳ4）。Then, based on the output of the temperature detection circuit 23 detected via the thermistor 23a,
It is determined whether or not the temperature has actually reached the total number determination start temperature 70 ° C. (step S 4 ).
【００７５】該判定の結果、ＹＥＳと判定されると、具
体的に合数判定に進む一方（ステップＳ5）、ＮＯの場
合は上記出力（５０％：５０％）での加熱と上記７０℃
の温度判定を繰り返す（ステップＳ4，Ｓ2，Ｓ3，
Ｓ4）。As a result of the determination, when the determination is YES, the process proceeds to the specific number determination (step S 5 ), while in the case of NO, the heating at the output (50%: 50%) and the 70 ° C.
Is repeated (steps S 4 , S 2 , S 3 ,
S 4).
【００７６】内鍋２の温度が上記合数判定開始温度７０
℃に達して合数判定（ステップＳ5）に進むと、上記合
数判定開始温度７０℃からの所定時間内の温度上昇率
（又は７０℃から所定温度までの上昇時間）に基き、現
在炊飯中の飯米の合数が、少量（図８Ｃ）か、中量（図
８Ｂ）か、大量（図８Ａ）かを順次判定する（ステップ
Ｓ6，Ｓ7）。The temperature of the inner pan 2 is equal to the total number determination start temperature 70
° C, and proceeds to the total number determination (step S 5 ), based on the temperature rise rate within a predetermined time from the above total number determination start temperature 70 ° C (or the rise time from 70 ° C to the predetermined temperature), the current rice cooking if the number of Hanmai in is either a small amount (FIG. 8C), or the amount of medium (Fig. 8B), mass (Fig. 8A) or sequentially determining (step S 6, S 7).
【００７７】その結果、例えば図８の（Ａ）の場合のよ
うな大炊飯量時には、先ず上記底面側第１のワークコイ
ルＣ1の出力を９０％で１４秒間ＯＮにし（ステップ
Ｓ8）、該１４秒が過ぎると（ステップＳ9でＹＥＳ）、
今度は側面側第２のワークコイルＣ2の出力を９０％で
同じく１４秒間ＯＮにし（ステップＳ10，Ｓ11）、それ
ぞれ交互にＯＮ，ＯＦＦさせる。該ＯＮ，ＯＦＦ状態
は、第１の沸騰工程完了温度１３５℃に達するまで継続
され、例えば図８の（Ａ）に示すように内対流と外対流
を交互に形成することによって、大量の御飯に対し、大
きな加熱量でのムラのない炊き上げ加熱を実行する。As a result, at the time of the large rice cooking amount as shown in FIG. 8A, for example, the output of the first work coil C1 at the bottom side is turned on at 90% for 14 seconds (step S 8 ). If the 14 seconds has passed (YES in step S 9),
Now the output of the side surface side second work coil C 2 to also 14 seconds ON and 90% (Step S 10, S 11), ON alternately respectively, causing OFF. The ON and OFF states are continued until the first boiling step completion temperature reaches 135 ° C., and for example, as shown in FIG. On the other hand, a uniform heating with a large amount of heating is performed.
【００７８】そして、該大量の炊飯量に対応した上記第
１の沸騰工程完了温度１３５℃に達したことが判定され
ると（ステップＳ12でＹＥＳ）、上記第１，第２のワー
クコイルＣ1，Ｃ2をそれぞれＯＦＦにした後、「むらし
工程」、「保温工程」に進む（ステップＳ23，Ｓ24）。When it is determined that the first boiling step completion temperature 135 ° C. corresponding to the large amount of cooked rice has been reached (YES in step S 12 ), the first and second work coils C are determined. 1, after the C 2 to each OFF, "steaming process", the process proceeds to "incubating process" (step S 23, S 24).
【００７９】この結果、上記大量時の飯米が、第１，第
２のワークコイルＣ1，Ｃ2による内鍋２の全体に均等に
作用する加熱量と、例えば図８の（Ａ）の実線および破
線の矢印に示すような交互に生じる内対流および外対流
とによって、ムラなく効率的に加熱されて、美味しい御
飯が炊き上げられる。As a result, the amount of cooked rice in a large amount uniformly acts on the entire inner pot 2 by the first and second work coils C 1 and C 2 , for example, and the solid line in FIG. In addition, the inner convection and the outer convection alternately generated as shown by the dashed arrows allow the rice to be heated efficiently and evenly, and delicious rice is cooked.
【００８０】一方、例えば図８の（Ｂ）の場合のような
中炊飯量時には、先ず上記底面側第１のワークコイルＣ
1の出力を７０％で１２秒間ＯＮにし（ステップ
Ｓ13）、該１２秒が過ぎると（ステップＳ14でＹＥ
Ｓ）、今度は側面側第２のワークコイルＣ2の出力を５
０％で１２秒間ＯＮにし（ステップＳ15，Ｓ16）、それ
ぞれ交互にＯＮ，ＯＦＦさせる。該ＯＮ，ＯＦＦ状態
は、第２の沸騰工程完了温度１３０℃に達するまで継続
され、例えば図８の（Ｂ）に示すように内対流と外対流
を交互に形成することによってムラのない炊き上げ加熱
を実行する。On the other hand, at the time of medium rice cooking, for example, in the case of FIG.
To 12 seconds ON 1 of the output at 70% (step S 13), if the 12 seconds has elapsed (YE in Step S 14
S), this time the output of the side surface side second work coil C 2 5
It is turned ON at 0% for 12 seconds (steps S 15 and S 16 ), and is turned ON and OFF alternately. The ON and OFF states are continued until the second boiling step completion temperature reaches 130 ° C., for example, as shown in FIG. 8B, by forming an internal convection and an external convection alternately to cook without unevenness. Perform heating.
【００８１】そして、該中量の炊飯量に対応した第２の
沸騰工程完了温度１３０℃に達したことが判定されると
（ステップＳ17でＹＥＳ）、上記第１，第２のワークコ
イルＣ1，Ｃ2をそれぞれＯＦＦにして、「むらし工
程」、「保温工程」に進む（ステップＳ23，Ｓ24）。[0081] Then, when it reaches the second boiling process completion temperature 130 ° C. corresponding to cooking of middle amount is determined (YES at step S 17), the first, second work coil C and 1, C 2 to each OFF, the process proceeds to "steaming process", "warmth step" (step S 23, S 24).
【００８２】この結果、上記中量時の飯米が第１，第２
のワークコイルＣ1，Ｃ2による内鍋２に対する均等な加
熱とともに、例えば図８の（Ｂ）の実線および破線の矢
印に示すような交互に生じる内対流および外対流によっ
て、ムラなく効率的に加熱されて、美味しい御飯が適切
な電力で有効に炊き上げられる。As a result, the rice in the above-mentioned medium amount was the first and second rice.
In addition to the uniform heating of the inner pan 2 by the work coils C 1 and C 2 , the inner convection and the outer convection alternately generated as shown by the solid and dashed arrows in FIG. When heated, delicious rice can be effectively cooked with appropriate power.
【００８３】他方、例えば図８の（Ｃ）の場合のような
少炊飯量時には、先ず上記底面側第１のワークコイルＣ
1の出力を５０％で１０秒間ＯＮにし（ステップ
Ｓ18）、該１０秒が過ぎると（ステップＳ19でＹＥ
Ｓ）、今度は側面側第２のワークコイルＣ2の出力を１
０％で１０秒間ＯＮにし（ステップＳ20，Ｓ21）、それ
ぞれ交互にＯＮ，ＯＦＦさせる。該ＯＮ，ＯＦＦ状態
は、第３の沸騰工程完了温度１２５℃に達するまで継続
され、例えば図８の（Ｃ）に示すように内対流と外対流
を交互に形成することによってムラのない炊き上げ加熱
を実行する。On the other hand, when the amount of cooked rice is small, for example, in the case of FIG.
1 of the output to 10 seconds ON and 50% (step S 18), if the 10 seconds has elapsed (YE in Step S 19
S), this time the output of the side surface side second work coil C 2 1
0% to 10 seconds ON (step S 20, S 21), ON alternately respectively, causing OFF. The ON and OFF states are continued until the third boiling step completion temperature reaches 125 ° C., for example, as shown in FIG. 8C, by forming an internal convection and an external convection alternately to cook without unevenness. Perform heating.
【００８４】そして、該少量の炊飯量に対応した第３の
沸騰工程完了温度１２５℃に達したことが判定されると
（ステップＳ22でＹＥＳ）、上記第１，第２のワークコ
イルＣ1，Ｃ2をそれぞれＯＦＦにして、「むらし工
程」、「保温工程」に進む（ステップＳ23，Ｓ24）。[0084] Then, when it reaches the third boiling step completion temperature 125 ° C. corresponding to cooking amounts of the at amount is determined (YES at step S 22), the first, second work coil C 1 , and the C 2 respectively OFF, the process proceeds to "steaming process", "warmth step" (step S 23, S 24).
【００８５】この結果、上記少量時の飯米が、例えば図
８の（Ｃ）の実線および破線の矢印に示すような交互に
生じる内対流および外対流によって、ムラなく効率的に
加熱されて、美味しい御飯が適切な省電力状態で有効に
炊き上げられる。As a result, the rice cooked in the small amount is uniformly and efficiently heated by the inner convection and the outer convection alternately generated as shown by, for example, the solid and broken arrows in FIG. Rice is cooked effectively in an appropriate power-saving state.
【００８６】以上の結果、本実施の形態の電気炊飯器に
よると、第１，第２の２組のワークコイル（加熱手段）
を適切に利用し、その時の炊飯量に応じて炊きムラを抑
制して御飯を効率的な加熱量で美味しく炊き上げること
ができるようになる。As a result, according to the electric rice cooker of the present embodiment, the first and second two sets of work coils (heating means)
, The rice can be cooked deliciously with an efficient amount of heating by suppressing uneven cooking in accordance with the amount of rice cooked at that time.
【００８７】（他の実施の形態） 以上の２つの実施の形態では、その何れの場合において
も、図１〜図４に示すように、内鍋２の加熱手段として
各々ワークコイルを採用した。(Other Embodiments) In each of the above two embodiments, as shown in FIGS. 1 to 4, a work coil was used as a heating means for the inner pot 2 in each case.
【００８８】しかし、本願発明の要旨は、炊飯量判定手
段により判定された炊飯量に応じて上記第１，第２の各
加熱手段各々の加熱出力の比率およびそれら相互の上述
した炊飯工程における加熱比率の関係を可変制御する
か、又はその場合における加熱作動状態を交互に形成す
る加熱制御手段を設け、例えば大炊飯量時には上記第
１，第２の各加熱手段共に十分な大加熱量で確実に炊き
上げ、また中炊飯量時には上記第１，第２の各加熱手段
共に上記大炊飯量時よりも若干小さい加熱量で焦げ目を
生じないように炊き上げ、さらに少炊飯量時には特に上
記第２の加熱手段の加熱量を小さくするようにし、例え
ば沸騰工程に入るとＯＦＦにするなどして確実に側部の
焦げ目の防止を図るとともに必ずしも直接飯米に作用し
ない第２の加熱手段の無駄な電力の消費を節減し、また
内対流と外対流の形成により内鍋内加熱温度分布の均一
化を図って効率的な加熱を実現する点にある訳であるか
ら、例えば上記底面側第１、側面側第２の各加熱手段は
ワークコイルに代えてヒータ線であっても良いことは言
うまでもない。However, the gist of the present invention is that the ratio of the heating output of each of the first and second heating means according to the rice cooked amount determined by the rice cooked amount determining means and the mutual heating in the above-mentioned rice cooking process are described. A heating control unit that variably controls the ratio relationship or alternately forms a heating operation state in that case is provided. For example, when the amount of cooked rice is large, both the first and second heating units are surely provided with a sufficient large heating amount. When the amount of medium rice is cooked, both the first and second heating means are cooked with a slightly smaller amount of heating than the large amount of rice cooked so as not to cause browning. The heating amount of the second heating means is set to be small, for example, it is turned off in the boiling step to surely prevent the burning of the side portion, and the second heating means which does not necessarily directly act on the cooked rice. This is because the point is to reduce wasteful power consumption, and to achieve uniform heating in the inner pan by forming inner convection and outer convection to achieve efficient heating. 1. Needless to say, the second side heating means may be a heater wire instead of a work coil.
【００８９】また、内鍋２は、内対流、外対流の形成が
容易な底部の丸い形状のものが好ましい。The inner pot 2 preferably has a round bottom with easy formation of inner convection and outer convection.
【図１】図１は、本願発明の各実施の形態に共通な電気
炊飯器本体の構成を示す前後方向中央部で左右に切断し
た中央縦断面図である。FIG. 1 is a central vertical cross-sectional view showing a configuration of an electric rice cooker main body common to each embodiment of the present invention, which is cut right and left at a center part in a front-rear direction.
【図２】図２は、同電気炊飯器本体の左右方向中央部で
前後方向に切断した中央縦断面図である。FIG. 2 is a central longitudinal sectional view of the electric rice cooker main body cut in a front-rear direction at a center part in a left-right direction.
【図３】図３は、同電気炊飯器本体の要部であるワーク
コイル部の拡大断面図である。FIG. 3 is an enlarged sectional view of a work coil portion, which is a main portion of the electric rice cooker main body.
【図４】図４は、同電気炊飯器の制御回路部の結線図で
ある。FIG. 4 is a connection diagram of a control circuit unit of the electric rice cooker.
【図５】図５は、本願発明の実施の形態１に係る電気炊
飯器の吸水工程からむらし工程に到る炊飯制御の内容を
示すフローチャートである。FIG. 5 is a flowchart showing the content of rice cooking control from the water absorption step to the draining step of the electric rice cooker according to Embodiment 1 of the present invention.
【図６】図６は、本願発明の実施の形態２に係る電気炊
飯器の吸水工程からむらし工程に到る炊飯制御の内容を
示すフローチャートである。FIG. 6 is a flowchart showing the content of rice cooking control from a water absorption step to a draining step of the electric rice cooker according to Embodiment 2 of the present invention.
【図７】図７は、同図６の炊飯制御の特徴である内鍋内
の２つの対流状態を対比して示す概略図である。7 is a schematic diagram comparing two convection states in an inner pot, which is a feature of the rice cooking control of FIG. 6; FIG.
【図８】図８は、上記図６の炊飯制御における大量、中
量、小量３段階の各炊飯量に対応した内鍋内の対流状態
を示す概略図である。FIG. 8 is a schematic diagram showing a convection state in an inner pot corresponding to each of three stages of large, medium, and small rice cooking amounts in the rice cooking control of FIG. 6;
【図９】図９は、底面側加熱手段と側面側加熱手段の２
組の加熱手段を使用した電気炊飯器の炊飯量（大量、中
量、小量）と各加熱手段との関係を示す概略図である。FIG. 9 is a diagram showing two types of bottom-side heating means and side-side heating means.
It is the schematic which shows the relationship between the amount of rice cooked (large amount, medium amount, small amount) of the electric rice cooker using a set of heating means, and each heating means.
１は電気炊飯器、２は内鍋（飯器）、３は内ケース、４
は外ケース、２３は温度検出回路部、２３ａはサーミス
タ、６１はマイコン制御ユニット、Ｃ1は第１のワーク
コイル、Ｃ2は第２のワークコイルである。1 is an electric rice cooker, 2 is an inner pot (rice cooker), 3 is an inner case, 4
The outer case 23 is the temperature detecting circuit section, 23a is a thermistor, 61 is a microcomputer control unit, C 1 first work coil, the C 2 is the second work coil.
Claims (5)
１の加熱手段と、上記内鍋の側面側に設けられた第２の
加熱手段と、炊飯量を判定する炊飯量判定手段と、該炊
飯量判定手段による炊飯量の判定が終了したのち、沸と
う工程が完了するまでの炊飯工程において、上記炊飯量
判定手段により判定された炊飯量に応じて、上記第１の
加熱手段の加熱出力の比率を所定の加熱出力比率に設定
するとともに上記第１の加熱手段の加熱出力の比率に対
する上記第２の加熱手段の加熱出力の比率を所定の比率
関係で設定して上記内鍋を加熱制御する加熱制御手段と
を備えてなる電気炊飯器において、上記加熱制御手段
は、上記炊飯量の判定が終了したのち上記沸とう工程が
完了するまでの間は、その時の炊飯量に応じ、炊飯量が
大きい時は炊飯量が小さい時に比べて上記第２の加熱手
段の加熱出力の比率に対する第１の加熱手段の加熱出力
の比率を一旦上記炊飯量の判定を行う前の加熱出力の比
率よりも所定比率大きく設定する一方、上記沸とう工程
が完了すると、同第２の加熱手段の加熱出力の比率に対
する第１の加熱手段の加熱出力の比率を所定比率小さく
設定するようにしたことを特徴とする電気炊飯器。1. An inner pot, a first heating means provided on a bottom side of the inner pot, a second heating means provided on a side face of the inner pot, and an amount of cooked rice for determining an amount of cooked rice After the determination of the amount of rice cooked by the determination means and the amount of rice cooked by the rice cooker determination means is completed, in the rice cooking process until the boiling step is completed, the first rice cooking amount is determined according to the rice cooked amount determined by the rice cooked amount determination means. The ratio of the heating output of the heating unit is set to a predetermined heating output ratio, and the ratio of the heating output of the second heating unit to the ratio of the heating output of the first heating unit is set in a predetermined ratio relationship. Heating control means for controlling the heating of the inner pot;
An electric rice cooker comprising:
After the above determination of the amount of cooked rice, the boiling step
Until it is completed, the amount of rice cooked depends on the amount of rice cooked at that time.
When the amount of cooked rice is large, compared to when the amount of cooked rice is small, the second heating
Heating power of the first heating means to the ratio of the heating power of the stage
The ratio of the heating output before once determining the amount of cooked rice
The boiling step is performed while the ratio is set to be higher than the predetermined ratio.
Is completed, the ratio of the heating output of the second heating means is reduced.
The ratio of the heating output of the first heating means to a predetermined ratio
An electric rice cooker characterized by being set .
１の加熱手段と、上記内鍋の側面側に設けられた第２の
加熱手段と、炊飯量を判定する炊飯量判定手段と、該炊
飯量判定手段による炊飯量の判定が終了した後、沸とう
工程が完了するまでの炊飯工程において、上記炊飯量判
定手段により判定された炊飯量に応じて、上記第１の加
熱手段の加熱出力の比率を所定の加熱出力比率に設定す
るとともに上記第１の加熱手段の加熱出力の比率に対す
る上記第２の加熱手段の加熱出力の比率を所定の比率関
係で設定して上記内鍋を加熱制御する加熱制御手段とを
備え、上記第１，第２の加熱手段は、何れか一方の加熱
手段が作動している時には他方側の加熱手段が作動しな
いように構成されていることを特徴とする電気炊飯器。2. An inner pot, first heating means provided on the bottom side of the inner pot, second heating means provided on the side face of the inner pot, and the amount of rice cooked for determining the amount of rice cooked After the determination of the amount of rice cooked by the determination means and the amount of rice cooked by the rice cooked amount determination means is completed, in the rice cooking process until the boiling step is completed, the first rice cooking amount is determined according to the rice cooked amount determined by the rice cooked amount determination means. The ratio of the heating output of the heating unit is set to a predetermined heating output ratio, and the ratio of the heating output of the second heating unit to the ratio of the heating output of the first heating unit is set in a predetermined ratio relationship. Heating control means for controlling the heating of the inner pot, wherein the first and second heating means are configured such that when one of the heating means is operating, the other heating means is not operated. An electric rice cooker, characterized in that:
水位よりも下方に位置して設けたことを特徴とする請求
項１又は２記載の電気炊飯器。3. The electric rice cooker according to claim 1, wherein the second heating means is provided below a water level of the inner pot at the time of full rice cooking.
のコーナ部に位置して設けたことを特徴とする請求項１
又は２記載の電気炊飯器。4. The apparatus according to claim 1, wherein the second heating means is provided at a corner between the bottom surface and the side surface of the inner pot.
Or the electric rice cooker according to 2.
クコイルよりなることを特徴とする請求項１，２，３又
は４記載の電気炊飯器。5. The electric rice cooker according to claim 1, wherein the first and second heating means each comprise a work coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8058875A JP3063611B2 (en) | 1996-03-15 | 1996-03-15 | Electric rice cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8058875A JP3063611B2 (en) | 1996-03-15 | 1996-03-15 | Electric rice cooker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09248242A JPH09248242A (en) | 1997-09-22 |
| JP3063611B2 true JP3063611B2 (en) | 2000-07-12 |
Family
ID=13096945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8058875A Expired - Lifetime JP3063611B2 (en) | 1996-03-15 | 1996-03-15 | Electric rice cooker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3063611B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200066658A (en) * | 2017-10-27 | 2020-06-10 | 시로카 가부시키가이샤 | electric rice cooker |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4509061B2 (en) * | 2006-05-29 | 2010-07-21 | 三菱電機株式会社 | Induction heating device |
| JP5104692B2 (en) * | 2008-02-29 | 2012-12-19 | パナソニック株式会社 | Induction heating cooker |
| JP7057193B2 (en) * | 2018-04-03 | 2022-04-19 | 象印マホービン株式会社 | Cooking device |
-
1996
- 1996-03-15 JP JP8058875A patent/JP3063611B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200066658A (en) * | 2017-10-27 | 2020-06-10 | 시로카 가부시키가이샤 | electric rice cooker |
| KR102351771B1 (en) * | 2017-10-27 | 2022-01-18 | 시로카 가부시키가이샤 | electric rice cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09248242A (en) | 1997-09-22 |
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